JP2006149241A - Fish catching method and fish attraction device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fish catching method and fish attracting device for catching various fishes, squids, crabs, etc., having phototactic nature. <P>SOLUTION: The fish attracting device uses a light radiation means furnished with an optical fiber 10 to irradiate the sea surface with the optical fiber or uses an optical fiber suspended in the sea to irradiate in the sea. A fishing means is suspended from a fisher boat at the non-irradiated side C of the boundary between the irradiated area and the non-irradiated area, or a fishing means 12 is placed at the non-irradiated side of the boundary to perform the fishing at the non-irradiated side of the boundary. As an alternative, an optical fiber is suspended in the sea, the undersea area is irradiated with light to gather fish, the optical fiber is pulled up to move the irradiated area A toward the sea surface and guide the fish school to the level, the light is put off, the area immediately above a fishing net is irradiated with an optical fiber suspended above the fishing net set in the sea and the fish school is guided to the irradiated area and caught. The fish attracting device uses the fishing method. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a method for efficiently catching fish having phototaxis and a fish collecting apparatus therefor. The fishing method and the fish collecting apparatus of the present invention are useful in fisheries such as various fishes having phototaxis and squid and crabs.

In addition to fish such as herring, sardines, horse mackerel, mackerel, saury, sandbill, flying fish, duck, isaki, squid, etc. as marine organisms that have the property of gathering in light (phototaxis or light collecting) Crabs, prawns, etc. are known. A fishing method using a fish collecting apparatus utilizing the phototaxis of these fish has been conventionally practiced.

Mainly used as a fish collector is a generator connected to the ship's power engine, and a large number of fluorescent lamps and mercury lamps are installed on the ship to irradiate the sea surface from the ship. This is a type of fish that is attached to a support post and is projected to the side of the hull to irradiate the sea surface to collect fish.

The conventional fish collection method irradiates the sea surface with light, so the light is scattered by the sea surface and the amount of light reaching the sea is reduced. Based on the recognition that the fish collection effect is insufficient, the optical fiber is used directly in the sea. A method of collecting fish by irradiating with light has been proposed. For example, a fish collecting apparatus that has a light emitting part on a ship and an optical fiber connected to the light emitting part, hangs one end of the optical fiber into the sea, and emits an optical fiber end part in the sea is known (Patent Document 1). . Furthermore, there is a known squid fish lamp system that uses a light source on a ship and a full-light-emitting optical fiber connected to the light source to emit light from the entire optical fiber suspended in the sea (Patent Document 2). There is also known a small fish lamp that blinks light around a fishing hook using an optical fiber from a light source (Patent Document 3).
JP 2003-310100 A Utility Model Registration No. 3050197 Japanese Utility Model Publication No. 06-72372

The fishing method using a conventional fish collecting device hangs the optical fiber of the fish collecting device or the fishing light into the sea and irradiates with light, and fishes or catches fish or squid collected in this light irradiation area, or catches and catches them. It is a method to do. However, it may not be sufficient to collect fish and squid in the light irradiation area. For example, squids collected in the light irradiation area are excited and have a low response to the fishing hook, so that a sufficient catch cannot be obtained.

The present invention solves the above-mentioned conventional problems in a fishing method using a fish collecting device and a fish collecting light, and provides a method for efficiently catching fish and squid collected in a light irradiation area. In the present invention, fish includes aquatic organisms other than fish such as squids, and the sea surface or the sea includes general water areas such as rivers and lakes. Furthermore, the fishing boat may be a boat for carrying out the present invention.

According to the present invention, the following fishing method and fish collection apparatus are provided.
(1) A fishing method characterized by collecting light by irradiating light on the sea surface or in the sea and fishing in a non-irradiation side boundary area between the light irradiation area and the non-irradiation area.
(2) Collecting fish by irradiating light to the sea surface or the sea around the fishing boat, and lowering fishing means from the fishing boat to the non-irradiation side boundary area between the light irradiation area and the non-irradiation area, or fishing to the non-irradiation side boundary area A fishing method characterized by installing means and fishing in the non-irradiation side boundary area.
(3) A fishing method characterized by collecting fish by irradiating light on the sea surface or in the sea, and then moving the light irradiation area to guide the fish school to the vicinity of the fishing net and catch it.
(4) The fishing method according to any one of claims 1 to 3, wherein the light irradiation means including an optical fiber is used to irradiate the sea surface with the optical fiber, or the optical fiber is suspended in the sea to irradiate the sea.
(5) After hanging the optical fiber of the light irradiating means into the sea and collecting the light by irradiating the sea with light, the optical fiber is pulled up to move the light irradiation area to the sea surface side to guide the school of fish. A fishing method comprising: after quenching, irradiating light directly above a fishing net with an optical fiber hanging down above a fishing net installed in the sea, and guiding and catching a school of fish to the light irradiation area.
(6) A light irradiation means including a light source and an optical fiber, and an illuminance meter, and irradiates the sea surface with the optical fiber of the light irradiation means or hangs the optical fiber down into the sea to irradiate the sea with the illuminance meter. A fish collecting apparatus characterized by grasping the boundary area between the light irradiation area and the non-irradiation area in the sea surface or in the sea.

The fishing method of the present invention is a fishing method characterized by collecting light by irradiating light on the sea surface or in the sea, and fishing in a non-irradiation side boundary region between the light irradiation region and the non-irradiation region. Specifically, for example, using a light irradiation means equipped with an optical fiber, the sea surface is irradiated with light, or the optical fiber is suspended in the sea and light is irradiated in the sea to collect fish, and the light irradiation area and non-irradiation are not irradiated. The fishing method is characterized in that the fishing means is lowered from the fishing boat in the non-irradiation side boundary area of the area, or the fishing means is installed in the non-irradiation side boundary area, and fishing is performed in the non-irradiation side boundary area. Even in the light irradiation area, such as squids, the excitement is slow and the reactivity to the bait fish is low. Like the light-irradiated area, the catch is high because the density of squids is high.

In addition, the fishing method of the present invention is a fishing method characterized in that after collecting fish by irradiating light on the sea surface or in the sea, the fish is guided by moving the light irradiation area to the vicinity of the fishing net to catch the fish. A large amount of fish can be efficiently caught by guiding the school of fish to a place where a fishing means such as a fishing net is previously installed.

In the above fishing method of the present invention, as a method for inducing a school of fish, for example, the optical fiber of the light irradiating means is suspended in the sea, and after collecting the light by irradiating the sea, the optical fiber is pulled up to bring the light irradiation area to the sea surface side. After moving to guide the school of fish, and then quenching the light irradiation area, light is irradiated directly above the fishing net with an optical fiber suspended above the fishing net installed in the sea, and the school of fish is guided to the light irradiation area. According to the fishing method, it is easy to catch a school of fish that migrates in the deep sea, and the fishing net can be shortened. be able to.

The fish collection apparatus of the present invention has a light irradiation means including a light source and an optical fiber and an illuminance meter, and irradiates the sea surface with the optical fiber of the light irradiation means, or hangs the optical fiber into the sea to light the sea. The fish collection device is characterized by illuminating and using the illuminometer to grasp the boundary area between the light irradiation area and the non-irradiation area on the sea surface or in the sea. The fishing means can be lowered from the fishing boat in the non-irradiation-side boundary area, or fishing means are installed in the non-irradiation-side boundary area, and squids, etc. Can be fished efficiently. In addition, since light is irradiated into the sea using an optical fiber, it is much more efficient than light irradiation from the sea surface, and fish collection costs can be greatly reduced.

The fishing method of the present invention will be specifically described based on the drawings. 1 and 2 are schematic diagrams illustrating an example of the fishing method of the present invention. As shown in the drawing, a light irradiation device provided with an optical fiber (optical cable) 10 is used to irradiate the sea surface or the sea through the optical fiber 10 from both sides of the fishing boat 11. FIG. 1 shows an example in which the optical fiber 10 is directed to the sea surface and light is irradiated from the sea surface to the sea, and FIG. 2 is an example in which the optical fiber 11 is suspended in the sea and the sea is irradiated with light.

The fish collection light emitted from the light source on the ship is irradiated from the fiber tip through the optical fiber 10. This irradiation angle can be adjusted by forming the end face of the tip of the optical fiber as an inclined surface having a predetermined angle with respect to the axial direction of the optical fiber. Alternatively, the direction of the optical fiber 10 may be changed.

By the light irradiation, bright light irradiation areas A are formed on both sides of the fishing boat 10, while a dark non-irradiation area B where light does not reach is formed directly below the both sides of the fishing boat. The fishing means 12 is lowered from the fishing boat to the non-irradiation side boundary area C between the light irradiation area A and the non-irradiation area B, or the fishing means (not shown) is installed in the non-irradiation side boundary area, Fishing is performed in the non-irradiation side boundary region C.

In the light irradiation area A, phototaxis fish are gathered to form a dense school of fish. In this light irradiation area A, squids such as squid are excited and less responsive to the fish bait, but in the non-irradiation area B, the excitement subsides and reacts well to the food, and the non-irradiation side boundary Since the area C is in contact with the light irradiation area A, the collection density of fish and squid is high, and the amount of catch can be increased efficiently by fishing in the boundary area C.

FIG. 3 shows an example in which fish is collected by irradiating light on the sea surface or in the sea, and then moving in the light irradiation area to guide the fish school to the vicinity of the fishing net and catch it. As shown in the drawing, the optical fiber 10 of the light irradiation means is suspended from the fishing boat 11 into the relatively deep sea, and the light is irradiated into the sea to collect the phototactic fish in the light irradiation area A. Thereafter, the optical fiber 10 is pulled up to move the light irradiation area A to the sea surface side to guide the school of fish, and then the light irradiation area A is quenched. The school of fish 13 is kept for a while after quenching. Subsequently, light is irradiated directly above the fishing net 13 by the optical fiber 15 hung down above the fishing net 14 previously installed in the sea, and the school of fish 13 is guided to the light irradiation area A. In this state, the fishing net 13 is rolled up and the fish 13 is surrounded and caught.

According to the fishing method shown in FIG. 3, it is possible to easily catch a school of fish that travels in a relatively deep sea, and the fishing net winding distance can be shortened. Obtainable. Furthermore, since the net is caught while surrounding the school of fish, the catch can be increased efficiently.

The fish collecting apparatus of the present invention includes, for example, a light source installed on a ship, a light irradiation means including an optical fiber connected to the light source, and an illuminometer. The illuminometer takes its measurement terminal down into the sea and measures the illuminance according to the depth of the sea. By this illuminance measurement, the underwater light irradiation area A, non-irradiation area B, and non-irradiation side boundary area C can be grasped.

The optical fiber is preferably formed by bundling a large number of single optical fibers. If the optical fiber is lowered into the sea and irradiated with light, there is no reflection of the sea surface, and light can be concentrated on the target area, so it is much more efficient than light irradiation from the sea surface, greatly increasing the cost of collecting fish. Can be reduced. Specifically, for example, there is no significant difference when the optical fiber of the present invention (3 to 6 KW power supply) is used with respect to the current fish lamp (180 KW power supply), and the power supply cost is about 1/30 to about It can be reduced significantly to 1/60.

The schematic diagram which shows the fishing method in the non-irradiation side boundary area of this invention The schematic diagram which shows the fishing method in the non-irradiation side boundary area of this invention The schematic diagram which shows the fishing method which guides the school of fish of this invention

Explanation of symbols

10-optical fiber, 11-fishing boat, 12-fishing fishing means, 13-fish school, 14-fishing net, 15-optical fiber, A-light irradiation area, B-non-irradiation area, C-non-irradiation side boundary area.

Claims (6)

A fishing method characterized by collecting light by irradiating light on the sea surface or in the sea and fishing in a non-irradiated side boundary region between a light irradiation region and a non-irradiation region.
Collect the fish by irradiating light to the sea surface or the sea around the fishing boat, and lower the fishing means from the fishing boat in the non-irradiation side boundary area between the light irradiation area and the non-irradiation area, or install the fishing means in the non-irradiation side boundary area And the fishing method characterized by fishing in this non-irradiation side boundary area.
A fishing method characterized by collecting light by irradiating light on the sea surface or in the sea, and then moving the light irradiation area to guide the fish school to the vicinity of the fishing net and catch it.
The fishing method according to any one of claims 1 to 3, wherein a light irradiation means including an optical fiber is used to irradiate the sea surface with the optical fiber, or the optical fiber is suspended in the sea to irradiate the sea with light.
After hanging the optical fiber of the light irradiation means into the sea and collecting the light by irradiating the sea with light, after raising the optical fiber and moving the light irradiation area to the sea surface side to guide the school of fish, and then quenching this light irradiation area A fishing method comprising: irradiating light directly above a fishing net with an optical fiber hanging down above a fishing net installed in the sea, and guiding a fish school to the light irradiation area for fishing.
A light source and an illuminometer, each having a light source and an optical fiber, and irradiating the sea surface with an optical fiber of the light irradiator; or suspending the optical fiber into the sea to irradiate the sea; A fish collecting apparatus characterized by grasping a boundary area between a light irradiation area and a non-irradiation area in the sea.

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